At any stage, you can move up or down the Taxonomic hierachy of Antarctic/subantarctic species by clicking on any name. Lower level taxon counts are shown in [].
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| Kingdom | Animalia | |
| Phylum | Cnidaria | |
| Class | Hydrozoa | |
| Order | Trachymedusae |
List of all species - see Taxon profile using the number
| Family Halicreatidae | ||||
| Botrynema brucei | Browne 1908 | |||
| Halicreas minimum | Fewkes 1882 | |||
| Haliscera conica | Vanhoffen 1902 | |||
| Haliscera racovitzae | (Maas 1906) | |||
| Halitrephes maasi | Bigelow 1909 | |||
| Family Petasidae | ||||
| Petasus digonimus | (Haeckel 1879) | |||
| Family Ptychogastriidae | ||||
| Ptychogastria antarctica | (Haeckel 1879) | |||
| Ptychogastria polaris | Allman 1878 | |||
| Family Rhopalonematidae | ||||
| Amphogona apicata | Kramp 1957a | |||
| Arctapodema ampla | (Vanhoffen 1902) | |||
| Arctapodema antarctica | (Vanhoffen 1912) | |||
| Arctapodema australis | (Vanhoffen 1912) | |||
| Crossota brunnea | Vanhoffen 1902 | |||
| Pantachogon haeckeli | (Maas 1893) | |||
| Pantachogon militare | (Maas 1893) | |||
| Pantachogon scotti | Browne 1910 | |||
| Rhopalonema funerarium | Vanhoffen 1902 | |||
| Rhopalonema velatum | Gegenbaur 1856 | |||